Based on phase manipulation of optical frequency combs and square-law detection of the waveforms, low phase-noise
frequency with its tunable repetition frequency ranging from 10GHz to 120GHz is generated using a dispersive medium
fed by coherent optical frequency combs with frequency interval controlled by pulse pattern generator. Both temporal
waveforms and phase noise are evaluated. The phase noise of generated 40GHz tone is -96.9dBc/Hz at 10 kHz offset.
We propose and experimentally demonstrate a simple method to generate ultra-wideband (UWB) pulses with different
pulse shape, based on incoherent optical arbitrary waveform generation. Pulses with opposite polarity are obtained using
the phase-modulator-based dual-input intensity modulator. Monocycle, doublet and high-order UWB pulses meeting the
FCC regulation are generated. Both temporal waveform and power spectral of the signal generated are evaluated.
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